Audacity can’t detect effects from guitarix and rakarrack

Ardour and Audacity on my computer are able to detect sound coming from digital amps like guitarix and rakarrack but they can’t detect the actual effects coming from these apps. I am connecting them using Jack. I see the bars moving and I have connected everything okay in rackarack. I can hear the effects when I play, but when I record I only hear the guitar without effects. I have the same issue as the user on this forum:
I am using Ubuntu.

I find it easiest to work with QjackCtl and not use patchage at all.
Do you use QjackCtl?